Exhaust extension



FIG. 1 is a side elevational view of an exhaust extension, showing mynew design;

FIG. 2 is an end elevational view thereof from the left in FIG. 1;

FIG. 3 is an elevational view thereof from the right in FIG. 1;

FIG. 4 is a fragmentary sectional view thereof as seen along the line4—4 in FIG. 1; and,

FIG. 5 is a fragmentary sectional view thereof as seen along the line5—5 in FIG. 1.

The ornamental design for an exhaust extension, as shown and described.